﻿//-----------------------------------------------------------------------
// <copyright file="SmartManipulatorTranslateHandle.cs" company="Nathan Miller">
// Copyright (c) Nathan Miller.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
//-----------------------------------------------------------------------
namespace TileTool.Base.Manipulator.Smart
{
    using System;
    using TileTool.Common.Math;
    using TileTool.Input;
    using TileTool.Render;

    /// <summary>
    /// Smart manipulator handle which is invisible and is used for
    /// translate handling.
    /// </summary>
    public class SmartManipulatorTranslateHandle : ManipulatorHandle
    {
        #region Fields - Private

        /// <summary>
        /// Collision callback function.
        /// </summary>
        private Func<Vector2D, bool> collisionFunc;

        #endregion

        #region Constructor

        /// <summary>
        /// Default constructor.
        /// </summary>
        /// <param name="collisionFunc">Collision function to call to handle collision for the handle.</param>
        public SmartManipulatorTranslateHandle(Func<Vector2D, bool> collisionFunc)
        {
            if (collisionFunc == null)
            {
                throw new ArgumentNullException("collisionFunc", "Collision callback must be non-null.");
            }

            this.collisionFunc = collisionFunc;
        }

        #endregion

        #region Methods - Public

        /// <summary>
        /// Draw the manipulator handle. The handle's matrix will be pushed
        /// onto the matrix stack when draw is called.
        /// </summary>
        /// <param name="renderData">Draw data.</param>
        public override void Draw(IRenderData renderData)
        {
        }

        /// <summary>
        /// Test the passed point to see if it is inside of this handle.
        /// </summary>
        /// <param name="posLS">Mouse position in local space.</param>
        /// <returns>Returns true if the point is in the handle.</returns>
        public override bool TestPoint(Vector2D posLS)
        {
            if (!base.TestPoint(posLS))
            {
                return false;
            }

            return this.collisionFunc(posLS);
        }

        #endregion
    }
}
